Improvement in tire-heating furnaces



2Sheets--8hee 2. l. K. SAX 8s. Gpw. REAR.

Tire- Heating Furnaces. N0.47,287. Patented Feb.0,1874.

WITNESSES. LN' T/EWTQRS CIP@ IM By UNITED STATES PATEN JOHN K. SAX ANDGEORGE W. KEAR, OF PITTSTON, PENNSYLVANIA.

IMPROVEMENT IN TIRE-HEATING FURNACES.

Specification forming part of Letters Patent No. 147,287, dated February10,1874; application filed January 8, 1874.

To all whom t may concern:

Be it known that we, J No. K. SAX and GEO. W. KEAR, of Pittston, in thecounty of Luzerne and State of Pennsylvania, have invented certain newand useful Improvements iu Furnaces; and we do hereby declare the folYlowingY to be a full, clear, and exact description of the invention,such as will enable others skilled in the art to which it pertains tomake and use it, reference being had to the accompanying dra-wings,which form part of this specification.

Our invention relates to an improvement in furnaces for heating annulartires, and other articles of the same nature that require to becarefully and uniformly heated; and consists in the combination ofdevices and appliances as hereinafter set forth and claimed.

In the drawings, Figure l is a view in elevation of the front of thefurnace, showing the doors through which the tires to be heated areinserted. Fig. 2 is a view of the back of the furnace, showing` thefurnace-door and the door to the ash-pit. Fig. 3 is a central verticalsection taken parallel with the front ofthe furnace.

A is a furnace, situated centrally and beneath two or moreheating-chambers, B B. C O are flues, through which the products ofcombustion pass from the furnace Ato the heating-chambers B. D D arechimney-lines, provided with suitable dampers, regulating the exit ofthe heat from the heating-chambers B B. Eis a grate, beneath which isthe ashpit F, closed in by the doors f. G is a tuyere for supplyiu g anydesired blast beneath the grate E to the furnace A. II II are doors,into which the tires to be heated are inserted, and placed in properposition encircling the flue O, after which they are closed. Theinterior of the furnace, the flues, and the heating-chambers are linedwith suitable nonconducting material that will resist the heat, andtheir surfaces are so arched or domed as to give a uniform reverberationof the heat. It is well known that tires must be heated uniformly, elseone portion willy be too much heated before other portions are broughtto the proper degree of heat, and, moreover, a steel or iron tire, likethose that are employed in car-wheels, wherein the body of the wheel iscast within the tire, should be heated not only uniformly, but to agreater degree upon the inside of the tire than upon the outside, inorder to facilitate welding. To that end this furnace is especiallyadapted.

The operation of the device is as follows: A door, H, is opened, and thetire I is placed within the heating-chamber B, and made to encircle theflue (l. The door is then closed, and heat is admitted into theheating-chamber. The degree of heat is governedby the amount of blastthrough the tuyere G, and the operation of suitable dampers in the iiuesD. As the heat enters the chamber B it comes in direct contact with theinterior surface of the tire. If the heat is not strong enough it may beincreased by a blast through the tuyere G. The outer walls of the deviceare constructed of iron, or other suitable material.

Having thus fully described our invention, what we claim as new, anddesire to secure by Letters Patent, is- Y 1. The tire-heating devicecomposed of heatingvchambers B, and centrally-located furnace A, andconnectingllues O, all substantially as described.

2. The combination of the furnace A E F, provided with the tuyere G, theheating-chambers B, counectingilues G, doors H, and exitilues D,substantially as and for the purpose described.

Intestimony that we claim the foregoing we have hereunto set our handsthis 3d day of January, 1874.

JOHN K. SAX. GEORGE ILV. REAR.

Titnesscs R. DEAN, ALFRED DARTE, Jr.

